Even if it does get scratched, you cant see it close enough to warrant worrying about it. Trust me, you dont want to sover the Home button, all you get after use is crumpled piece of plastic, the curved surface does not hold well for covering with anything, just like the sides of the iPhone. Plus, you handle and use the Home button the most often compared to the other parts of the iPhone, so it would get worn out the fastest if you try and protect it with plastic coverings. Best leave it as it is.